tests/store_test: Split matrix tests into separate test cases

Modified structure of matrix-based unit tests.
Now each test case can be invoked separately.
New matrix tests are hard bound to "BlueStore".

Now:
...
BlueStore/SyntheticShardingLimited.
  Test/0  # GetParam() = { 65536, 10000, 65536, 262144, 4096, 1000, 65536, 60, 300, 150, true, true }
  Test/1  # GetParam() = { 4096, 10000, 65536, 262144, 4096, 1000, 65536, 60, 300, 150, true, true }
  Test/2  # GetParam() = { 65536, 10000, 65536, 262144, 4096, 200, 65536, 60, 300, 150, true, true }
  Test/3  # GetParam() = { 4096, 10000, 65536, 262144, 4096, 200, 65536, 60, 300, 150, true, true }
  Test/4  # GetParam() = { 65536, 10000, 65536, 262144, 4096, 50, 65536, 60, 300, 150, true, true }
  Test/5  # GetParam() = { 4096, 10000, 65536, 262144, 4096, 50, 65536, 60, 300, 150, true, true }
BlueStore/SyntheticMatrixCsumAlgorithm.
  Test/0  # GetParam() = { 65536, 65536, 1048576, 16, crc32c, false }
  Test/1  # GetParam() = { 65536, 65536, 1048576, 16, crc32c_16, false }
  Test/2  # GetParam() = { 65536, 65536, 1048576, 16, crc32c_8, false }
  Test/3  # GetParam() = { 65536, 65536, 1048576, 16, xxhash32, false }
  Test/4  # GetParam() = { 65536, 65536, 1048576, 16, xxhash64, false }
  Test/5  # GetParam() = { 65536, 65536, 1048576, 16, none, false }
BlueStore/SyntheticMatrixCsumVsCompression.
  Test/0  # GetParam() = { 4096, 131072, 262144, 512, force, snappy, crc32c, true, true, false }
  Test/1  # GetParam() = { 16384, 131072, 262144, 512, force, snappy, crc32c, true, true, false }
  Test/2  # GetParam() = { 4096, 131072, 262144, 512, force, zlib, crc32c, true, true, false }
  Test/3  # GetParam() = { 16384, 131072, 262144, 512, force, zlib, crc32c, true, true, false }
...
Before:
...
  SyntheticLimited/0  # GetParam() = "memstore"
  SyntheticLimited/1  # GetParam() = "bluestore"
  SyntheticLimited/2  # GetParam() = "kstore"
  SyntheticMatrixCsumAlgorithm/0  # GetParam() = "memstore"
  SyntheticMatrixCsumAlgorithm/1  # GetParam() = "bluestore"
  SyntheticMatrixCsumAlgorithm/2  # GetParam() = "kstore"
  SyntheticMatrixCsumVsCompression/0  # GetParam() = "memstore"
  SyntheticMatrixCsumVsCompression/1  # GetParam() = "bluestore"
  SyntheticMatrixCsumVsCompression/2  # GetParam() = "kstore"
...

Signed-off-by: Adam Kupczyk <[email protected]>

Author: aclamk