fix: replace trash icon in MRF steps

[scottheng96]

Problem

In MRF workflow, blocks have trash icon (top right) giving users ability to delete the step in workflow. For baseline practice in UX, destructive actions should be hidden below the fold

Closes FRM-1905

Solution

• Replace trash icon with pencil icon

• Update logic upon clicking icon to 'edit step' instead of 'delete step'

• First step has pencil icon now also, since users can't delete the first step, but can edit the first step

• Users will not be able to click anywhere on the box to enter editing step, only on clicking of the pencil icon

• Removed highlight/background change/cursor appearance when hovering the box

Before & After Screenshots

Subject	Before	After
Trash icon replaced with pencil icon (first step included)
On click
Additional changes to behavior or edit/cursor		https://github.com/user-attachments/assets/6b45ec88-0467-4bd0-bdab-97d0e7fdee55

[KenLSM]

We can also remove handleOpenDeleteModal property from type InactiveStepBlockProps as handleOpenDeleteModal is no longer referenced in the component.

This also means that we have to cascade the removal of handleOpenDeleteModal property on the parent component of <InactiveStepBlock />

[KenLSM]

LGTM but holding the approval first as I'm getting PM to review the changes in-lieu of Design.

[linear]

FRM-1905 Replacing trash icon with pencil icon in MRF steps

[KenLSM]

LGTM!