Fix incompatibilities with the new ChatMessage

[anakin87]

After the merge of the new ChatMessage (deepset-ai/haystack#8640), I ran the unit tests of core integrations with Haystack main branch (as also our nightly runs do) and I found several minor errors to fix.

Most of the errors involve

• ChatMessage class methods invoked with content instead of text
• accessing content attribute (instead of text) - I tried to do this in Update all components with ChatMessage to use text instead of content #1236 but I forgot something

I will open several different PRs: if the change involves the actual code and not only tests, we need to separately release each one of the affected integrations.

[anakin87]

done in the linked PRs
for each of the affected packages, a new version has been released