RI-7573 Rename "Saved queries" to "Sample queries"

[valkirilov]

Description

Rename "Saved queries" to "Sample queries" everywhere in the new Search page

• button in the top right corner used to open the respective panel
• title of the panel
• fallback message when there is no data

How it was tested

Manually

1. Open the Databases page and connect to an existing database (or establish a connection with a new instance)
2. Go to the Search tab from the main navbar
3. Open the Sample Queries panel from the top right corner

Automatically via e2e tests

You can always refer to the README, but simply running the following commands should do the trick for you

# From the root directory
yarn dev:api

# In a new tab, again from the root directory
yarn dev:ui

# In a new tab, but this time go to tests/playwright directory
yarn test:chromium:local-web vector-search/saved-queries

# Then, check the detailed report and all the video recordings
yarn playwright show-report

[github-actions]

Code Coverage - Frontend unit tests

St.❔	Category	Percentage	Covered / Total
🟢	Statements	82.15%	20027/24379
🟡	Branches	67.47%	8680/12865
🟡	Functions	76.3%	5332/6988
🟢	Lines	82.57%	19607/23746

Test suite run success

5162 tests passing in 677 suites.

Report generated by 🧪jest coverage report action from 767b382

[pawelangelow]

So, can we drop the comment?

[valkirilov]

I prefer to keep it for now, because in the second iteration, we plan to add CRUD for these saved queries, and ideally, we should check not for the hardcoded queries, but for the actual queries.