fix: Revert "fix: missing js sourcemaps with rewritten imports broke debugging (#7767) (#9476)"

[benmccann]

Description

This reverts commit 3fa96f6. FYI @BenceSzalai

This is causing SvelteKit's source map test to fail with an incorrect location. See the failing tests on this branch: sveltejs/kit#7543

To move forward, we can do something along the lines of:

1. commit this PR to revert back to the old behavior
2. update the issue with the additional information we've learned
3. start a new PR, add 2 testcases that a) check stacktrace positions with line and column and b) sourcemap accuracy in general (may initially fail due to importanalysis updates not being recorded)
4. implement proper sourcemap support for importanalysis in dev (test should pass now)
5. test perf impact by comparing main with that PR
6. if 5 shows low to no impact, just change the behavior, if it shows slowdowns, add an option
7. merge PR for 4.1

Additional context

Discussion on Discord in #ecosystem-ci thread 2022113-sveltekit:
https://discord.com/channels/804011606160703521/1047380773990314004/1047447169168310328

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
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