[win32] do not call getImageData on getBounds call

[akoch-yatta]

This commit unifies the getBounds calculation for ImageDataProvider and ImageFileNameProvider by always scaling the bounds of an existing handle of an image, if the bounds for a different zoom are requested.

fixes #1639

[github-actions]

Test Results

   492 files   -   1     492 suites   - 1   6m 45s ⏱️ - 3m 6s
 4 106 tests  - 190   4 099 ✅  - 186   7 💤  -  3  0 ❌  - 1 
16 157 runs   - 380  16 065 ✅  - 366  92 💤  - 13  0 ❌  - 1 

Results for commit 404155d. ± Comparison against base commit 00c2cf3.

This pull request removes 190 tests.

org.eclipse.swt.tests.junit.Test_org_eclipse_swt_browser_Browser ‑ test_BrowserFunction_callback[browser flags: 524,288]
org.eclipse.swt.tests.junit.Test_org_eclipse_swt_browser_Browser ‑ test_BrowserFunction_callback_afterPageReload[browser flags: 524,288]
org.eclipse.swt.tests.junit.Test_org_eclipse_swt_browser_Browser ‑ test_BrowserFunction_callback_with_String[browser flags: 524,288]
org.eclipse.swt.tests.junit.Test_org_eclipse_swt_browser_Browser ‑ test_BrowserFunction_callback_with_boolean[browser flags: 524,288]
org.eclipse.swt.tests.junit.Test_org_eclipse_swt_browser_Browser ‑ test_BrowserFunction_callback_with_integer[browser flags: 524,288]
org.eclipse.swt.tests.junit.Test_org_eclipse_swt_browser_Browser ‑ test_BrowserFunction_callback_with_javaReturningInt[browser flags: 524,288]
org.eclipse.swt.tests.junit.Test_org_eclipse_swt_browser_Browser ‑ test_BrowserFunction_callback_with_javaReturningString[browser flags: 524,288]
org.eclipse.swt.tests.junit.Test_org_eclipse_swt_browser_Browser ‑ test_BrowserFunction_callback_with_multipleValues[browser flags: 524,288]
org.eclipse.swt.tests.junit.Test_org_eclipse_swt_browser_Browser ‑ test_BrowserFunction_multiprocess[browser flags: 524,288]
org.eclipse.swt.tests.junit.Test_org_eclipse_swt_browser_Browser ‑ test_ClearAllSessionCookies[browser flags: 524,288]
…

This pull request skips 1 test.

org.eclipse.swt.tests.junit.Test_org_eclipse_swt_browser_Browser ‑ test_Constructor_multipleInstantiationsInDifferentThreads[browser flags: 0]

♻️ This comment has been updated with latest results.