feat(core): Bump `sentry-javascript` to version 8, temporarily disable performance

[krystofwoldrich]

This PR bumps sentry-javascript to version 8 and fixes all breaking changes regarding error reporting.

Performance monitoring is disabled and will be fixed in a follow-up PR.

[github-actions[bot]]

	Fails
:no_entry_sign:	Please consider adding a changelog entry for the next release.

	Messages
:book:	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

- Bump `sentry-javascript` to version 8 ([#3736](https://github.com/getsentry/sentry-react-native/pull/3736))

If none of the above apply, you can opt out of this check by adding #skip-changelog to the PR description.

Generated by :no_entry_sign: dangerJS against bdf385b892fef94dcc0eac6ef502fcc390facce6

[github-actions[bot]]

Android (legacy) Performance metrics :rocket:

	Plain	With Sentry	Diff
Startup time	439.16 ms	486.06 ms	46.90 ms
Size	17.73 MiB	19.90 MiB	2.17 MiB

[github-actions[bot]]

iOS (legacy) Performance metrics :rocket:

	Plain	With Sentry	Diff
Startup time	1233.02 ms	1233.87 ms	0.85 ms
Size	2.36 MiB	2.91 MiB	556.10 KiB

[github-actions[bot]]

Android (new) Performance metrics :rocket:

	Plain	With Sentry	Diff
Startup time	337.87 ms	366.24 ms	28.37 ms
Size	7.15 MiB	8.18 MiB	1.03 MiB

[github-actions[bot]]

iOS (new) Performance metrics :rocket:

	Plain	With Sentry	Diff
Startup time	1232.52 ms	1244.53 ms	12.01 ms
Size	2.92 MiB	3.47 MiB	561.65 KiB

[krystofwoldrich]

• Superseded by https://github.com/getsentry/sentry-react-native/pull/3836