fix(extension): Don't show full data:text/html content on generated HTML report page #4166

Job	Run time
accessibility-checker-test-basic-windows (18.x)	12m 52s
accessibility-checker-test-basic (14.x)	9m 39s
accessibility-checker-test-basic2 (18.x)	8m 58s
accessibility-checker-test-basic (18.x)	9m 25s
accessibility-checker-engine-test (18.x)	3m 23s
accessibility-checker-test-playwright (18.x)	7m 18s
accessibility-checker-test-selenium (18.x)	7m 42s
accessibility-checker-test-wdio (18.x)	7m 52s
act-results (18.x)	15m 14s
cypress-checker-test-basic (18.x)	3m 21s
java-accessibility-checker-playwright-test (18.x)	8m 17s
extension-test (18.x)	11m 6s
java-accessibility-checker-selenium-test (18.x)	10m 3s
karma-accessibility-checker-test (18.x, karma.conf1b.js)	4m 20s
rule-deploy (18.x)	3m 41s
karma-accessibility-checker-test (18.x, karma.conf2b.js)	4m 7s
karma-accessibility-checker-test (18.x, karma.conf3.js)	4m 3s
	2h 11m 21s

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