[Enhancement]: Form widget reskinning

[dilippitchika]

https://www.notion.so/appsmith/Form-42fd8dcc1ecf43159b13393a95ddedf2

[github-actions[bot]]

We have found issues that are potential duplicates:

• [#10999] [Enhancement]: List widget reskinning (83.33%)

• [#10997] [Enhancement]: Filepicker widget reskinning (80%)

• [#10991] [Enhancement]: Tree-select widget reskinning (80.77%)

• [#10984] [Enhancement]: Multi-select widget reskinning (81.25%)

• [#10983] [Enhancement]: Rating widget reskinning (85%)

• [#10982] [Enhancement]: Modal widget reskinning (80%)

• [#10979] [Enhancement]: Image widget reskinning (83.33%)

• [#10978] [Enhancement]: Iframe widget reskinning (83.33%)

• [#10976] [Enhancement]: Divider widget reskinning (82.14%) If any of the issues listed above are a duplicate, please consider closing this issue & upvoting the original one.
  Alternatively, if neither of the listed issues addresses your feature/bug, keep this issue open.

[chandannkumar]

Tested this and LGTM

• Tested the presence of default border color and width on adding new form
• Tested adding form on container type widgets
• Tested on edit and deploy mode