Shallow clone CatchupOPs and Test Blob Handle On SharedString

[anthony-murphy]

Tried to repo the below issues on main with blobs and map but didn't seem to hit it. looks like things have changed, but wanted to add the test, and the move to shallow clone anyway. Will try to repo on 0.27

related #3956
related #3707

[msfluid-bot]

■ @fluidframework/base-host: No change

Metric Name	Baseline Size	Compare Size	Size Diff
main.js	177.03 KB	177.03 KB	■ No change
Total Size	177.03 KB	177.03 KB	■ No change

⯅ @fluid-example/bundle-size-tests: +17 Bytes

Metric Name	Baseline Size	Compare Size	Size Diff
container.js	239.9 KB	239.9 KB	⯆ -1 Bytes
map.js	100.52 KB	100.52 KB	■ No change
matrix.js	197.74 KB	197.74 KB	■ No change
odspDriver.js	251.81 KB	251.81 KB	⯆ -1 Bytes
sharedString.js	227.87 KB	227.88 KB	⯅ +19 Bytes
Total Size	1017.84 KB	1017.85 KB	⯅ +17 Bytes

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Baseline commit: 1c1ea33

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