dirstate: remove the python-side whitelist of allowed matchers This whitelist is too permissive because it allows matchers that contain disallowed ones deep inside, for example through `intersectionmatcher`. It is also too restrictive because it doesn't pass through some of the matchers we support, such as `patternmatcher`. It's also unnecessary because unsupported matchers raise `FallbackError` and we fall back anyway. Making this change makes more of the tests use rust code path, and therefore subtly change behavior. For example, rust status in largefiles repos seems to have strange behavior.

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  $ hg init repo

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  $ cd repo

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  $ touch foo

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  $ hg ci -Am 'add foo'

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  adding foo

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  $ hg up -C null

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  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

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this should be stored as a delta against rev 0

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  $ echo foo bar baz > foo

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  $ hg ci -Am 'add foo again'

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  adding foo

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  created new head

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  $ hg debugindex foo

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     rev linkrev       nodeid    p1-nodeid    p2-nodeid

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       0       0 b80de5d13875 000000000000 000000000000

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       1       1 0376abec49b8 000000000000 000000000000

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  $ cd ..