Remove shape() tests from interop-2023-cssmasking

[progers]

Test List

css/css-masking/animations/clip-path-interpolation-shape.html
css/css-masking/clip-path/animations/clip-path-shape-interpolation-001.html
css/css-masking/clip-path/animations/clip-path-shape-interpolation-002.html
css/css-masking/clip-path/clip-path-shape-001.html
css/css-masking/clip-path/clip-path-shape-002-units.html
css/css-masking/clip-path/clip-path-shape-002.html
css/css-masking/clip-path/clip-path-shape-003.html
css/css-masking/clip-path/clip-path-shape-004.html
css/css-masking/parsing/clip-path-shape-parsing.html

Rationale

Shape() is a new (css-shapes-2) feature that is not yet supported in any engine, and all implementations fail these tests. Shape was not discussed during the initial interop proposal (#148) and was likely included due to including all tests under the css-masking directory.

@nt1m @dholbert @nandu

[nt1m]

Lgtm

[dholbert]

Sounds fine. Thanks!