Bump google test version in hammer

The following discussion from !2213 (merged) should be addressed:

• @andrei started a discussion:

  I think we should start catching up to the googletest versions.

  I bumped it up to the latest version. Ran unit tests. All pass. If you agree to include the change, here is the patch.

  diff --git a/hammer.py b/hammer.py
  index 7426f6a117..7a932f71ca 100755
  --- a/hammer.py
  +++ b/hammer.py
  @@ -1099,3 +1099,3 @@ def _install_gtest_sources():
       # download gtest sources only if it is not present as native package
  -    gtest_version = '1.10.0'
  +    gtest_version = '1.14.0'
       gtest_path = f'/usr/src/googletest-release-{gtest_version}/googletest'
  @@ -1107,3 +1107,4 @@ def _install_gtest_sources():
       cmd = 'wget --no-verbose -O ~/.hammer-tmp/gtest.tar.gz '
  -    cmd += f'https://github.com/google/googletest/archive/release-{gtest_version}.tar.gz'
  +
  +    cmd += f'https://github.com/google/googletest/archive/refs/tags/v{gtest_version}.tar.gz'
       execute(cmd)
  @@ -1111,3 +1112,3 @@ def _install_gtest_sources():
       execute('sudo tar -C /usr/src -zxf ~/.hammer-tmp/gtest.tar.gz')
  -    execute(f'sudo ln -sf /usr/src/googletest-release-{gtest_version} /usr/src/googletest')
  +    execute(f'sudo ln -sf /usr/src/googletest-{gtest_version} /usr/src/googletest')
       execute('rm -rf ~/.hammer-tmp')