Implement one line `foreach` macros for hash tables.

[Rot127]

Your checklist for this pull request

• [x] I've read the guidelines for contributing to this repository
• [x] I made sure to follow the project's coding style
• [x] I've documented or updated the documentation of every function and struct this PR changes. If not so I've explained why.
• [x] I've added tests that prove my fix is effective or that my feature works (if possible)
• [ ] I've updated the rizin book with the relevant information (if needed)

Detailed description

Adds one line foreach macros for hash tables and in extend sets.

Additionally:

• Renames the already existing for each mechanism to ht_foreach_cb (cb for call back), so they can be distinguished.
• it adds a ht_xx_size() function for simpler access to the ht->count member.
• Renames file for hash table unit tests from test_sdb_hash.c to test_ht.c. Because it was hard to find before with a search.

Test plan

Tests added.

Closing issues

...

[XVilka]

@Rot127 one bindgen linter error:

Mismatched function annotation for rz_set_s_size at <rizin/librz/include/rz_util/rz_set.h:23:13> : RZ_NONNULL (was RZ_NULLABLE at <rizin/librz/util/set.c:75:13>

[XVilka]

Please rebase.

[Rot127]

Superseded by https://github.com/rizinorg/rizin/pull/4639