symbols: Fix columns

Created by: chrismwendt

Before

After

• Made the symbols service return lines 0-based
• Added character to the output of the symbols service
• Adjusted back to 1-based in the frontend/backend package (lol it really is called that)
• Dropped pattern

Resolves https://github.com/sourcegraph/sourcegraph/issues/32295

Depends on https://github.com/sourcegraph/sourcegraph/pull/32300

There's another issue that seems relevant https://github.com/sourcegraph/sourcegraph/pull/23664 @rvantonder am I missing something here?

The indexed search query path still seems to work:

Test plan

Ran locally, also added a test.