Require the except hash extension before trying to alias it

[lsylvester]

#34012 added an alias to to except for HashWithIndiferentAccess, but the except method comes from a core extension which may not have been required.

The PR adds a require for the except method so that it is always available for aliasing.

Should fix some build issues with #33079.

[rails-bot]

r? @kaspth

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[TomaszGrudzinski]

If that alias is truly needed (I don't believe it is), it should be moved to the active_support/core_ext/hash/except.rb file so that the except method would always be defined.

[y-yagi]

This does not happen if active_support is required first, so it seems that there is no error in the test of the master branch.
That is because it requires active_support/core_ext/hash/except at i18n.rb.
I think that it is not good to rely on this, and I think that dependent libraries should be required in that file.

[y-yagi]

@lsylvester Thanks!