fix(Canvas): Fix Edge source misplaced for containers

[lordrip]

Context

In order to make room for the node's secondary label, the containers were expanded by 10px.

The problem comes when in vertical layout, that additional size is not taken into account when calculating the edges since the size is only reflected in the visualization part and not during the layout calculation.

The solution for now is to increase the group padding just a bit to make the secondary label to fit.

Before	After

fix: https://github.com/KaotoIO/kaoto/issues/1575

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Codecov Report

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1584 +/- ## ======================================= Coverage ? 79.91% Complexity ? 272 ======================================= Files ? 280 Lines ? 7998 Branches ? 1527 ======================================= Hits ? 6392 Misses ? 1545 Partials ? 61 ```

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[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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