Dropped namespacing of test cases

The main benefit is small test ids everywhere, though this is with the
downside of needing longer names to properly prefix and avoid
collisions. But this fits into the rest of the scripts with globally
unique names a bit better. This is a C project after all.

The other small benefit is test generators may have an easier time since
per-case symbols can expect to be unique.

tests/test_exhaustion.toml

@@ -1,5 +1,5 @@
 # test running a filesystem to exhaustion
-[cases.exhaustion]
+[cases.test_exhaustion_normal]
 defines.ERASE_CYCLES = 10
 defines.BLOCK_COUNT = 256 # small bd so test runs faster
 defines.BLOCK_CYCLES = 'ERASE_CYCLES / 2'
@@ -92,7 +92,7 @@ exhausted:
 
 # test running a filesystem to exhaustion
 # which also requires expanding superblocks
-[cases.exhaustion_superblocks]
+[cases.test_exhaustion_superblocks]
 defines.ERASE_CYCLES = 10
 defines.BLOCK_COUNT = 256 # small bd so test runs faster
 defines.BLOCK_CYCLES = 'ERASE_CYCLES / 2'
@@ -186,7 +186,7 @@ exhausted:
 # check for.
 
 # wear-level test running a filesystem to exhaustion
-[cases.wear_leveling_exhaustion]
+[cases.test_exhuastion_wear_leveling]
 defines.ERASE_CYCLES = 20
 defines.BLOCK_COUNT = 256 # small bd so test runs faster
 defines.BLOCK_CYCLES = 'ERASE_CYCLES / 2'
@@ -286,7 +286,7 @@ exhausted:
 '''
 
 # wear-level test + expanding superblock
-[cases.wear_leveling_exhaustion_superblocks]
+[cases.test_exhaustion_wear_leveling_superblocks]
 defines.ERASE_CYCLES = 20
 defines.BLOCK_COUNT = 256 # small bd so test runs faster
 defines.BLOCK_CYCLES = 'ERASE_CYCLES / 2'
@@ -383,7 +383,7 @@ exhausted:
 '''
 
 # test that we wear blocks roughly evenly
-[cases.wear_leveling_distribution]
+[cases.test_exhaustion_wear_distribution]
 defines.ERASE_CYCLES = 0xffffffff
 defines.BLOCK_COUNT = 256 # small bd so test runs faster
 defines.BLOCK_CYCLES = [5, 4, 3, 2, 1]