feat(xds): filter-chain builder constructor require name

[mmorel-35]

Replaces FilterChainNameConfigurer with the addition of the name as constructor argument for FilterChainBuilder.

Checklist prior to review

• Link to relevant issue as well as docs and UI issues -- xDS generators should require resource names #2538
• This will not break child repos: it doesn't hardcode values (.e.g "kumahq" as a image registry) and it will work on Windows, system specific functions like syscall.Mkfifo have equivalent implementation on the other OS --
• Tests (Unit test, E2E tests, manual test on universal and k8s) --
• Do you need to update UPGRADE.md? --
• Does it need to be backported according to the backporting policy? --
• Do you need to explicitly set a > Changelog: entry here or add a ci/ label to run fewer/more tests?

[bartsmykla]

I'm not sure, but I think this PR description is a little bit misleading. Constructors now expect a name as a second parameter, but we are not checking if the name is not empty. I would say that we should maybe require the non empty name here (even if envoy allows empty name in filter-chains)?

@jakubdyszkiewicz wdyt?

[mmorel-35]

It would be nice to require a name but right now only a few filter chains has a name so I just modified the builder interface to make it visible.
To make the name mandatory, the naming logic needs to be implemented first.
The same situation will happen when it comes to the RouteBuilder

[bartsmykla]

@mmorel-35 after #7105 landed, could you update this PR?

[lobkovilya]

@mmorel-35 could you please introduce a string const:

const AnonymousResource = ""

and pass it to every FilterChainBuilder that doesn't have a name yet. So in the future when we want to get rid of all anonymous resources (to close #2538) we could simply search for usage of this const.

[mmorel-35]

Hi @lobkovilya ,
It's done :) !