RI-7681: Polish sentinel add / edit / clone forms

[dantovska]

What

Applied different styling to polish all forms relating sentinel:

• Add sentinel db form - increase text, align footer buttons
• Edit sentinel database - fix some title size, add spacings
• Clone sentinel database - also fix title sizes, spacings, required forms

Note: The database information in the edit form is handled in this PR - #5149

Testing

Need to have sentinel database added.

1. Add db form -> Redis sentinel button in the connectivity section - opens the targeted modal

Before	After

2. Edit db form -> open sentinel db for edit

Before	After

3. Clone sentile db -> in the edit form, Clone connection buttom in the top right

Before	After

[github-actions]

Code Coverage - Frontend unit tests

St.❔	Category	Percentage	Covered / Total
🟢	Statements	82.53%	20483/24819
🟡	Branches	67.74%	8775/12953
🟡	Functions	77.07%	5489/7122
🟢	Lines	82.94%	20055/24180

Test suite run success

5255 tests passing in 687 suites.

Report generated by 🧪jest coverage report action from f5637f1

[ArtemHoruzhenko]

@dantovska I feel like you have different text sizes for this container

[ArtemHoruzhenko]

lgtm

[KrumTy]

LGTM 👍