[Embed Block] Set EmbedLinkSettings URL input cursor at start of link

[jd-alexander]

Fixes https://github.com/WordPress/gutenberg/issues/35888

To test: https://github.com/WordPress/gutenberg/pull/36100

PR submission checklist:

• [x] I have considered adding unit tests where possible.
• [x] I have considered if this change warrants user-facing release notes more info and have added them to RELEASE-NOTES.txt if necessary.

[peril-wordpress-mobile[bot]]

Wanna run full suite of Android and iOS UI tests? Click here and 'Approve' CI job!

[fluiddot]

Hey @jd-alexander ! We will cut the 1.66.0 release on 2021-11-11. I plan to circle back and bump this PR to the next milestone then, but please let me know if you’d rather us work to include this PR in 1.66.0. Thanks!

[SiobhyB]

👋 @jd-alexander, we plan to cut the 1.67.0 release around 10:00 UTC tomorrow, on Thursday 25th November. I plan to circle back and bump this PR to the next milestone then, but please let me know if you'd rather us work to include this PR in 1.67.0.

As a reminder, changes in the next (1.68.0) release won't be shipped to users until the 10th January.

Thanks!

[guarani]

👋 Hi @jd-alexander. We will cut the 1.68.0 release on Dec 9th. I plan to circle back and bump this PR to the next milestone then, but please let me know if you’d rather us work to include this PR in 1.68.0. 🙇

[hypest]

Joel is currently AFK so, best to remove the milestone assignment for a bit. Will do it now.