gh-133390: Support SQL keyword completion for sqlite3 CLI (#133393)

[encukou]

• Issue: Support completion for sqlite3 command-line interface #133390

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📚 Documentation preview 📚: https://cpython-previews--135292.org.readthedocs.build/

[encukou]

!buildbot aarch64.Fedora.Stable.PR

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🤖 New build scheduled with the buildbot fleet by @encukou for commit 10f822b 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F135292%2Fmerge

The command will test the builders whose names match following regular expression: aarch64.Fedora.Stable.PR

The builders matched are:

• aarch64 Fedora Stable PR

[encukou]

!buildbot aarch64.Fedora.Stable.PR

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @encukou for commit bd6a870 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F135292%2Fmerge

The command will test the builders whose names match following regular expression: aarch64.Fedora.Stable.PR

The builders matched are:

• aarch64 Fedora Stable PR

[encukou]

!buildbot AMD64.Ubuntu.Shared.PR

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @encukou for commit bd6a870 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F135292%2Fmerge

The command will test the builders whose names match following regular expression: AMD64.Ubuntu.Shared.PR

The builders matched are:

• AMD64 Ubuntu Shared PR

[encukou]

!buildbot AMD64.Ubuntu.Shared.PR

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @encukou for commit 3d9721a 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F135292%2Fmerge

The command will test the builders whose names match following regular expression: AMD64.Ubuntu.Shared.PR

The builders matched are:

• AMD64 Ubuntu Shared PR

[encukou]

!buildbot AMD64.Ubuntu.Shared.PR|aarch64.Fedora.Stable.PR

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @encukou for commit f1fa6c7 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F135292%2Fmerge

The command will test the builders whose names match following regular expression: AMD64.Ubuntu.Shared.PR|aarch64.Fedora.Stable.PR

The builders matched are:

• AMD64 Ubuntu Shared PR
• aarch64 Fedora Stable PR

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @encukou for commit f1fa6c7 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F135292%2Fmerge

If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again.

[encukou]

Alright, looks like we now pass everywhere!

• In some configurations, Python needs some env variables to start, so the environment needs to be updated rather than replaced.
• The show-all-if-ambiguous readline setting means that alternatives are listed after a single tab, so with \t\t they got listed twice.