hterm: osc52.sh: add a --force flag to ignore limits
hterm: osc52.sh: add a --force flag to ignore limits

We set a 100kb limit to help catch accidental large copies.  But
sometimes that's what we want and we're willing to wait for it.
Add a --force flag so people can ignore the limit.

Change-Id: Ia6e96d10c32394c81255cfbe27cd63ff017246c4
Reviewed-on: https://chromium-review.googlesource.com/c/apps/libapps/+/1895763
Reviewed-by: Joel Hockey <9ecfc52dc2ffef73afac73f3495f294aeddf1231@chromium.org>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

chromium/hterm,chromium/hterm,chromium/hterm,chromium/hterm