Add support for dynamic backends for IonQ

[Cynocracy]

Using the backends endpoint, add available backends to the list.

[coveralls]

Pull Request Test Coverage Report for Build 2147249411

• 13 of 14 (92.86%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.01%) to 99.986%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
projectq/setups/ionq.py	4	5	80.0%
<!--	Total:	13	14	92.86%	-->

Totals
Change from base Build 2147243803:	-0.01%
Covered Lines:	7000
Relevant Lines:	7001

---

💛 - Coveralls

[Takishima]

Don't worry about the CentOS CI failures. Those distros have reached EOL and will be fixed or removed from the CI in a separate PR.

[Takishima]

Also, could you please send an email to info@projectq.ch to request a link to sign the ProjectQ CLA?

[Cynocracy]

Thank you for the speedy review! Will take a look sometime today :)

[Cynocracy]

Also, could you please send an email to info@projectq.ch to request a link to sign the ProjectQ CLA?

Done, added changelog, and formatted things. Let me know what you think! Sorry if I missed anything

[Takishima]

I double checked and it appears that we will have to require you to sign the ProjectQ CLA in order to merge these changes.

Could you please send an email to info@projectq.ch requesting the link to sign the CLA?

In the meantime I will try to work on a PR to address the CI issues.

[Cynocracy]

Sure! Sent an email but haven't gotten a response yet, should I send another?

[Takishima]

Sure! Sent an email but haven't gotten a response yet, should I send another?

I cannot find trace of this email anywhere in the ProjectQ mailbox... Could you try again and CC me in the email (damien.nguyen@alumni.epfl.ch)

If that one does not get through I will manually forward this to the right person.

[Takishima]

Sure! Sent an email but haven't gotten a response yet, should I send another?

Thanks for re-sending the email, you should receive an email to sign the CLA shortly. Sorry about that delay.

[Cynocracy]

Thanks! Should I have the CLA now? Wasn't sure I saw it

[Takishima]

Thanks! Should I have the CLA now? Wasn't sure I saw it

Yes, you should have received a mail about it by now.

[Cynocracy]

Got it now! Signed and returned :)

[Takishima]

Got it now! Signed and returned :)

I can confirm that from my end as well. I have just merged #429 so I just let the CI run once more and if everything looks good, I'll merge this.

[Cynocracy]

Thank you!