Update SHA for CSP and remove unused patch files (base-path and tar-fs-upgrade)

[austinjang2]

1. Updated sha on webview.diff
2. Removed base-path patch
3. Removed tar-fs-upgrade patch

Issue #, if available:

Description of changes:

1. Webviews are normally served from vscode-webview.net but we want them self-hosted. When doing this, CSP will block resources like viewing images so we need to add 'self' to the CSP to fix the issue.
2. base-path.diff was removed as it's superseded by base-path-compability.diff. The compability patch maps --base-path to --server-base-path, leveraging VSCode's existing base path handling instead of reimplementing it
3. tar-fs-upgrade.patch was removed in 1.8 because the current VSCode submodule (2901c5ac6db) already includes a newer version of tar-fs, making this patch obsolete. Impact is low risk as this is just a dependency version bump.

Testing:
Run with command 'make run-local' which builds SageMaker Code Editor locally. Prior to this change, we discovered a bug through local testing in which CE was not able to open Python files/Jupyter notebooks, but issue was fixed after updating csp.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[austinjang2]

Hash can be updated by:

1. Running code-editor
2. Opening dev-tool
3. Check CSP error in console which will let you know what hash to use
4. Update hash in respective html file.

[aakashmandavilli96]

LGTM!