[Enhancement]: Form widget reskinning

[dilippitchika]

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

[github-actions]

We have found issues that are potential duplicates:

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

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

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

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

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

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

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

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

• [[Enhancement]: Divider widget reskinning #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