Fix(bundler): use different alias mappings based on the target.

[Hanaasagi]

What does this PR do?

Close: #3844

1. When bundling the code, use different alias mappings based on the target.

• Documentation or TypeScript types (it's okay to leave the rest blank in this case)
• Code changes

How did you verify your code works?

I wrote automated tests.

• I checked the lifetime of memory allocated to verify it's (1) freed and (2) only freed when it should be
• I or my editor ran zig fmt on the changed files
• I included a test for the new code, or an existing test covers it
• JSValue used outside outside of the stack is either wrapped in a JSC.Strong or is JSValueProtect'ed

[Jarred-Sumner]

can we make this two separate ComptimeStringMap with all the values for each? That way there's only one hash table lookup for each target, instead of two. The ++ operator should work to combine two comptime-known arrays of tuples

[Hanaasagi]

yes, fixed.

[Jarred-Sumner]

Thank you. Sorry I took awhile to merge this