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_relocations.toml

@@ -1,5 +1,5 @@
 # specific corner cases worth explicitly testing for
-[cases.dangling_split_dir]
+[cases.test_relocations_dangling_split_dir]
 defines.ITERATIONS = 20
 defines.COUNT = 10
 defines.BLOCK_CYCLES = [8, 1]
@@ -77,7 +77,7 @@ code = '''
     lfs_unmount(&lfs) => 0;
 '''
 
-[cases.outdated_head]
+[cases.test_relocations_outdated_head]
 defines.ITERATIONS = 20
 defines.COUNT = 10
 defines.BLOCK_CYCLES = [8, 1]
@@ -168,7 +168,7 @@ code = '''
 # reentrant testing for relocations, this is the same as the
 # orphan testing, except here we also set block_cycles so that
 # almost every tree operation needs a relocation
-[cases.reentrant_relocations]
+[cases.test_relocations_reentrant]
 reentrant = true
 # TODO fix this case, caused by non-DAG trees
 if = '!(DEPTH == 3 && CACHE_SIZE != 64)'
@@ -236,7 +236,7 @@ code = '''
 '''
 
 # reentrant testing for relocations, but now with random renames!
-[cases.reentrant_relocations_renames]
+[cases.test_relocations_reentrant_renames]
 reentrant = true
 # TODO fix this case, caused by non-DAG trees
 if = '!(DEPTH == 3 && CACHE_SIZE != 64)'