Use frozen string literal in actionview/

[kirs]

Follow-up to #29655

Extends Style/FrozenStringLiteralComment Rubocop rule to actionview/.

The commit is just rubocop -a after changing the Rubocop rule.

Similar to:
#29728
#29819
#29732
#29896

[rails-bot]

r? @matthewd

(@rails-bot has picked a reviewer for you, use r? to override)

[kirs]

Note: I had to exclude .builder fixtures because using frozen string literal there leads to warnings:

actionview/test/fixtures/actionpack/test/non_erb_block_content_for.builder:1: warning: `frozen_string_literal' is ignored after any tokens
actionview/test/fixtures/actionpack/test/hello.builder:1: warning: `frozen_string_literal' is ignored after any tokens
actionview/test/fixtures/actionpack/layouts/builder.builder:1: warning: `frozen_string_literal' is ignored after any tokens
actionview/test/fixtures/actionpack/test/hello_world_container.builder:1: warning: `frozen_string_literal' is ignored after any tokens
actionview/test/fixtures/actionpack/test/_hello.builder:1: warning: `frozen_string_literal' is ignored after any tokens
actionview/test/fixtures/actionpack/test/hello_world_from_rxml.builder:1: warning: `frozen_string_literal' is ignored after any tokens

Likely because Builder templates are eval'ed.

[kirs]

#29900 should fix the test failures.

[kirs]

The build looks good, besides flaky actioncable tests.

[kirs]

cc @sgrif