[Fix] Fix empty databricks_share creation failing with 'no fields to update'

[slimbnsalah]

Changes

The Plugin Framework implementation of databricks_share calls w.Shares.Update() unconditionally in the Create method after w.Shares.Create(). When the resource is created with no object blocks, the UpdateShare request has an empty Updates slice, no Owner, and no Comment, causing the API to reject it with:

Error: failed to update share
UpdateShare no fields to update.

Fix

Wrapped the Update call in the Create method with a guard that skips it when there is nothing to update:

if len(shareChanges.Updates) > 0 || shareChanges.Owner != "" || !plan.Comment.IsNull() {
    // ... call Update ...
}

This mirrors the guard already present in the Update method at line 386:

if len(changes) > 0 || !plan.Comment.IsNull() {

When there's nothing to update, the share returned by Create is used directly for state.

Fixes #5442

[github-actions]

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Inputs:

• PR number: 5443
• Commit SHA: 7dd21e86de49f3c0f1e07cc73b0baebf5c0ee73c

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