[FR] Upgrade OpenCTI analyzer for v4 compatibility

[amr-cossi]

Feature description
The current analyzer is only compatible with OpenCTI v3.
A new major version of OpenCTI (v4) has been released and support for v3 has been dropped.
This feature modifies the OpenCTI analyzer to have it compatible with OpenCTI v4 only.

Describe the solution you'd like
Two flavors are now available instead of one:

• The first one searches for an exact match and returns only 1 observable when there is a hit
• The second one does a fulltext search to return a list of observables matching a pattern. It is usefull to know if a domain name is present inside a URL in the platform for eg.

Additional context
As with the first version, I have provided TheHive templates which haven't been tested. If someone wants to have a look at them on a TheHive test instance before the merge it would be nice.

[amr-cossi]

#928

[amr-cossi]

Fixes the following bug: #919