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Fixes#29585.
#29314 and #29385 made it so their respective settings are only recognized when provided to the host as a whole.
This PR makes it so that the relevant settings for the preferences on the file override those of the preferences on the host.
A custom `SourceMapSource` can optionally provide its own `skipTrivia`
function. If this is not provided then the compiler will use the default
function designed for TypeScript source files.
Previously, when calling this default function we were passing the current
`sourceMapSource` rather than the specified `source` whose trivia needs
to be skipped. This resulted in the `pos` being incorrectly calculated for
external source files that need mapping.
**Side note:**
There are actually two possible constructors available for creating
`SourceMapSource` objects. One of them defaults to an identity function
for the `skipTrivia` function if it is not provided (see
49689894d7/src/compiler/utilities.ts (L6972-L6976))
and the other one leaves the `skipTrivia` field `undefined` (see
5fc8f1dd80/src/services/services.ts (L776-L797))
Unfortunately, it appears that the second of these two constructors is the
one available when importing the "typescript" module in node.js code.
* Add user preference to control renaming through exports
* Only impact renaming
* Update baselines
* Use flag to control all prefix and suffix text and imports
* [WIP] add tests
* Only skip export import specifier with flag
* [WIP] Update tests
* Update test
* Pick up preference from host and update test
* Shorten flag name
* Add missing utility function
* Update comment
* [WIP] rename flag and respond to cr
* [WIP] Add flag for forRelatedSymbol
* Use larger search symbol set for old-style rename
* Respond to CR
* Fix small error
* Fix type mismatch
* Update comment and remove unnecessary exprot
* Respond to CR
