[cisco_umbrella] Add Mobile Devices as hosts

[LaZyDK]

What does this PR do?

It will add a new identity type "Mobile Devices" as a host.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.

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Build stats

• Start Time: 2023-05-08T13:23:10.178+0000

• Duration: 14 min 13 sec

Test stats 🧪

Test	Results
Failed	0
Passed	10
Skipped	0
Total	10

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	100.0% (1/1)	💚
Classes	100.0% (1/1)	💚
Methods	95.238% (20/21)	👍 4.329
Lines	94.805% (511/539)	👍 5.916
Conditionals	100.0% (0/0)	💚

[P1llus]

/test

[P1llus]

/test

[elasticmachine]

Package cisco_umbrella - 1.10.1 containing this change is available at https://epr.elastic.co/search?package=cisco_umbrella