When chunk selector is failing to allocate chunks during create volume, allow to return failure and error out instead of crashing

[yamingk]

To reproduce:

./Debug/src/lib/volume/tests/test_volume --gtest_filter=VolumeTest.CreateDestroyVolume --gc_timer_nsecs=3 --num_vols=32

Stack trace:

[08/26/25 15:58:32-07:00] [E] [test_volume] [43425] [volume_chunk_selector.cpp:75:allocate_init_chunks] Couldnt allocate chunks for volume=18
*** Aborted at 1756249112 (Unix time, try 'date -d @1756249112') ***
*** Signal 11 (SIGSEGV) (0x0) received by PID 43425 (pthread TID 0x7f0ab1ce6700) (linux TID 43425) (code: address not mapped to object), stack trace: ***
    @ 0000000003f44600 _ZN5folly10symbolizer12_GLOBAL__N_118innerSignalHandlerEiP9siginfo_tPv
                       /home/jenkins/.conan2/p/b/folly1754c67fa6ea1/b/src/folly/experimental/symbolizer/SignalHandler.cpp:449
    @ 0000000003f446e6 _ZN5folly10symbolizer12_GLOBAL__N_113signalHandlerEiP9siginfo_tPv
                       /home/jenkins/.conan2/p/b/folly1754c67fa6ea1/b/src/folly/experimental/symbolizer/SignalHandler.cpp:470
    @ 000000000004532f (unknown)
    @ 00000000029db340 _ZN9__gnu_cxx17__normal_iteratorIPSt10shared_ptrIN10homeblocks19VolumeChunkSelector7HBChunkEESt6vectorIS5_SaIS5_EEEC2ERKS6_
                       /usr/include/c++/11/bits/stl_iterator.h:1028
                       -> /tmp/source/yk_hb/src/lib/volume/volume_chunk_selector.cpp
    @ 00000000029d9437 _ZNSt6vectorISt10shared_ptrIN10homeblocks19VolumeChunkSelector7HBChunkEESaIS4_EE5beginEv
                       /usr/include/c++/11/bits/stl_vector.h:812
                       -> /tmp/source/yk_hb/src/lib/volume/volume_chunk_selector.cpp
    @ 00000000029cfd99 _ZN10homeblocks19VolumeChunkSelector12select_chunkEtRKN9homestore15blk_alloc_hintsE
                       /tmp/source/yk_hb/src/lib/volume/volume_chunk_selector.cpp:115
    @ 0000000002da0ac5 _ZN9homestore10VirtualDev10alloc_blksEtRKNS_15blk_alloc_hintsERNS_10MultiBlkIdE
                       /home/jenkins/.conan2/p/b/homesaaac956d10ada/b/src/lib/device/virtual_dev.cpp:242
    @ 0000000002d9f440 _ZN9homestore10VirtualDev21alloc_contiguous_blksEtRKNS_15blk_alloc_hintsERNS_5BlkIdE
                       /home/jenkins/.conan2/p/b/homesaaac956d10ada/b/src/lib/device/virtual_dev.cpp:189
    @ 0000000002b50107 _ZN9homestore12IndexWBCache9alloc_bufEjOSt8functionIFN5boost13intrusive_ptrINS_9BtreeNodeEEERKSt10shared_ptrINS_11IndexBufferEEEE
                       /home/jenkins/.conan2/p/b/homesaaac956d10ada/b/src/lib/index/wb_cache.cpp:104
    @ 000000000290ecff _ZN9homestore10IndexTableIN10homeblocks14VolumeIndexKeyENS1_16VolumeIndexValueEE10alloc_nodeEb
                       /root/.conan2/p/homesee984c635b1f2/p/include/homestore/index/index_table.hpp:293
                       -> /tmp/source/yk_hb/src/lib/volume_mgr.cpp
    @ 00000000028e8d71 _ZN9homestore5BtreeIN10homeblocks14VolumeIndexKeyENS1_16VolumeIndexValueEE15alloc_leaf_nodeEv
                       /root/.conan2/p/homesee984c635b1f2/p/include/homestore/btree/detail/btree_node_mgr.ipp:237
                       -> /tmp/source/yk_hb/src/lib/volume_mgr.cpp
    @ 0000000002911c68 _ZN9homestore5BtreeIN10homeblocks14VolumeIndexKeyENS1_16VolumeIndexValueEE16create_root_nodeEPv
                       /root/.conan2/p/homesee984c635b1f2/p/include/homestore/btree/detail/btree_node_mgr.ipp:34
                       -> /tmp/source/yk_hb/src/lib/volume_mgr.cpp
    @ 00000000029cbea3 _ZN9homestore10IndexTableIN10homeblocks14VolumeIndexKeyENS1_16VolumeIndexValueEEC1EN5boost5uuids4uuidES7_jRKNS_11BtreeConfigEjRKSt6vectorItSaItEEjm
                       /root/.conan2/p/homesee984c635b1f2/p/include/homestore/index/index_table.hpp:91
                       -> /tmp/source/yk_hb/src/lib/volume/volume.cpp
    @ 00000000029cb09a _ZSt12construct_atIN9homestore10IndexTableIN10homeblocks14VolumeIndexKeyENS2_16VolumeIndexValueEEEJRN5boost5uuids4uuidES8_iRNS0_11BtreeConfigEmRSt6vectorItSaItEERjRmEEDTgsnwcvPvLi0E_T_pispcl7declvalIT0_EEEEPSJ_DpOSK_
                       /usr/include/c++/11/bits/stl_construct.h:97
                       -> /tmp/source/yk_hb/src/lib/volume/volume.cpp
    @ 00000000029cb1aa _ZNSt16allocator_traitsISaIN9homestore10IndexTableIN10homeblocks14VolumeIndexKeyENS2_16VolumeIndexValueEEEEE9constructIS5_JRN5boost5uuids4uuidESB_iRNS0_11BtreeConfigEmRSt6vectorItSaItEERjRmEEEvRS6_PT_DpOT0_
                       /usr/include/c++/11/bits/alloc_traits.h:518
                       -> /tmp/source/yk_hb/src/lib/volume/volume.cpp
    @ 00000000029caed8 _ZNSt23_Sp_counted_ptr_inplaceIN9homestore10IndexTableIN10homeblocks14VolumeIndexKeyENS2_16VolumeIndexValueEEESaIS5_ELN9__gnu_cxx12_Lock_policyE2EEC2IJRN5boost5uuids4uuidESD_iRNS0_11BtreeConfigEmRSt6vectorItSaItEERjRmEEES6_DpOT_
                       /usr/include/c++/11/bits/shared_ptr_base.h:519
                       -> /tmp/source/yk_hb/src/lib/volume/volume.cpp