chore(deps): update dependency io_abseil_py to v2

[github-actions]

This PR contains the following updates:

Package	Type	Update	Change
io_abseil_py	http_archive	major	v1.4.0 -> v2.0.0

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Release Notes

abseil/abseil-py

v2.0.0

Compare Source

New

• Support Python 3.12.

Changed

• absl-py no longer supports Python 3.6. It has reached end-of-life for more
  than a year now.
• (logging) logging.exception can now take exc_info as argument, with
  default value True. Prior to this change setting exc_info would raise
  KeyError, this change fixes this behaviour.
• (testing) For Python 3.11+, the calls to absltest.TestCase.enter_context
  are forwarded to unittest.TestCase.enterContext (when called via instance)
  or unittest.TestCase.enterClassContext (when called via class) now. As a
  result, on Python 3.11+, the private _cls_exit_stack attribute is not
  defined on absltest.TestCase and _exit_stack attribute is not defined on
  its instances.
• (testing) absltest.TestCase.assertSameStructure() now uses the test case's
  equality functions (registered with TestCase.addTypeEqualityFunc()) for
  comparing leaves of the structure.
• (testing) abslTest.TestCase.fail() now names its arguments
  (self, msg=None, user_msg=None), and not (self, msg=None, prefix=None),
  better reflecting the behavior and usage of the two message arguments.
• DEFINE_enum, DEFINE_multi_enum, and EnumParser now raise errors when
  enum_values is provided as a single string value. Additionally,
  EnumParser.enum_values is now stored as a list copy of the provided
  enum_values parameter.
• (testing) Updated paramaterized.CoopTestCase() to use Python 3 metaclass
  idioms. Most uses of this function continued working during the Python 3
  migration still worked because a Python 2 compatibility __metaclass__
  variables also existed. Now pure Python 3 base classes without backwards
  compatibility will work as intended.
• (testing) absltest.TestCase.assertSequenceStartsWith now explicitly fail
  when passed a Mapping or Set object as the whole argument.

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