feat(debugging): move gdbinit generation to CMake

This feature is useful for 3rd-party software to run GDB with predefined
options that described in project_description.json file

allow to pass custom options to "idf.py gdb":

  --gdb-commands: command line arguments for gdb. (without changes)
  -ex: pass command to gdb.
  -x: pass gdbinit file to gdb. Alias for old --gdbinit command

tools/test_idf_py/test_idf_py.py

@@ -13,9 +13,7 @@ from unittest import main
 from unittest import mock
 from unittest import TestCase
 
-import elftools.common.utils as ecu
 import jsonschema
-from elftools.elf.elffile import ELFFile
 
 try:
     from StringIO import StringIO
@@ -265,48 +263,6 @@ class TestHelpOutput(TestWithoutExtensions):
         self.action_test_idf_py(['help', '--json', '--add-options'], schema_json)
 
 
-class TestROMs(TestWithoutExtensions):
-    def get_string_from_elf_by_addr(self, filename: str, address: int) -> str:
-        result = ''
-        with open(filename, 'rb') as stream:
-            elf_file = ELFFile(stream)
-            ro = elf_file.get_section_by_name('.rodata')
-            ro_addr_delta = ro['sh_addr'] - ro['sh_offset']
-            cstring = ecu.parse_cstring_from_stream(ro.stream, address - ro_addr_delta)
-            if cstring:
-                result = str(cstring.decode('utf-8'))
-        return result
-
-    def test_roms_validate_json(self):
-        with open(os.path.join(py_actions_path, 'roms.json'), 'r') as f:
-            roms_json = json.load(f)
-
-        with open(os.path.join(py_actions_path, 'roms_schema.json'), 'r') as f:
-            schema_json = json.load(f)
-        jsonschema.validate(roms_json, schema_json)
-
-    def test_roms_check_supported_chips(self):
-        from idf_py_actions.constants import SUPPORTED_TARGETS
-        with open(os.path.join(py_actions_path, 'roms.json'), 'r') as f:
-            roms_json = json.load(f)
-        for chip in SUPPORTED_TARGETS:
-            self.assertTrue(chip in roms_json, msg=f'Have no ROM data for chip {chip}')
-
-    def test_roms_validate_build_date(self):
-        sys.path.append(py_actions_path)
-
-        rom_elfs_dir = os.getenv('ESP_ROM_ELF_DIR')
-        with open(os.path.join(py_actions_path, 'roms.json'), 'r') as f:
-            roms_json = json.load(f)
-
-        for chip in roms_json:
-            for k in roms_json[chip]:
-                rom_file = os.path.join(rom_elfs_dir, f'{chip}_rev{k["rev"]}_rom.elf')
-                build_date_str = self.get_string_from_elf_by_addr(rom_file, int(k['build_date_str_addr'], base=16))
-                self.assertTrue(len(build_date_str) == 11)
-                self.assertTrue(build_date_str == k['build_date_str'])
-
-
 class TestFileArgumentExpansion(TestCase):
     def test_file_expansion(self):
         """Test @filename expansion functionality"""