[Saved Object] No validations when create/import saved_objects with special characters

[wwang500]

Kibana version:

7.16.0 BC5

Describe the bug:

When creating or importing custom saved objects (i.e. index patterns) with special chars into kibana, there is currently no validation in place.

The consequences are:

• The detailed page of the save_object (index pattern) might be blank,
• Machine learning Anomaly Detection and Data Frame analytic pages might be blank,
• There might be more places as well.

Steps to reproduce:

1. Save the below text to a .ndjson file,

{"attributes":{"fieldAttrs":"{}","fields":"[]","runtimeFieldMap":"any?\nSet-cookie: Tamper=5b4764ff-65e5-48f3-af8f-ed5f6a2f9c77","title":"cloned","typeMeta":"{}"},"coreMigrationVersion":"7.16.0","id":"00100950-4766-11ec-acb2-950edb4e669a","migrationVersion":{"index-pattern":"7.11.0"},"references":[],"sort":[1637126395502,2131],"type":"index-pattern","updated_at":"2021-11-17T05:19:55.502Z","version":"WzI2MDU0LDFd"}
{"attributes":{"fieldAttrs":"{}","fields":"\";print(chr(122).chr(97).chr(112).chr(95).chr(116).chr(111).chr(107).chr(101).chr(110));$var=\"","runtimeFieldMap":"{}","title":"cloned","typeMeta":"{}"},"coreMigrationVersion":"7.16.0","id":"006021f0-4762-11ec-acb2-950edb4e669a","migrationVersion":{"index-pattern":"7.11.0"},"references":[],"sort":[1637124678082,1284],"type":"index-pattern","updated_at":"2021-11-17T04:51:18.082Z","version":"WzE1MDE5LDFd"}
{"attributes":{"fieldAttrs":"{}","fields":"[]","runtimeFieldMap":"any\r\nSet-cookie: Tamper=5b4764ff-65e5-48f3-af8f-ed5f6a2f9c77\r\n","title":"cloned","typeMeta":"{}"},"coreMigrationVersion":"7.16.0","id":"00ab37e0-4766-11ec-acb2-950edb4e669a","migrationVersion":{"index-pattern":"7.11.0"},"references":[],"sort":[1637126396515,2130],"type":"index-pattern","updated_at":"2021-11-17T05:19:56.515Z","version":"WzI2MDU2LDFd"}
{"attributes":{"fieldAttrs":"{}","fields":"';print(chr(122).chr(97).chr(112).chr(95).chr(116).chr(111).chr(107).chr(101).chr(110));$var='","runtimeFieldMap":"{}","title":"cloned","typeMeta":"{}"},"coreMigrationVersion":"7.16.0","id":"00db4560-4762-11ec-acb2-950edb4e669a","migrationVersion":{"index-pattern":"7.11.0"},"references":[],"sort":[1637124678867,1287],"type":"index-pattern","updated_at":"2021-11-17T04:51:18.867Z","version":"WzE1MDMwLDFd"}
{"attributes":{"fieldAttrs":"{}","fields":"[]","runtimeFieldMap":"any?\r\nSet-cookie: Tamper=5b4764ff-65e5-48f3-af8f-ed5f6a2f9c77\r\n","title":"cloned","typeMeta":"{}"},"coreMigrationVersion":"7.16.0","id":"01481420-4766-11ec-acb2-950edb4e669a","migrationVersion":{"index-pattern":"7.11.0"},"references":[],"sort":[1637126397543,2129],"type":"index-pattern","updated_at":"2021-11-17T05:19:57.543Z","version":"WzI2MDY3LDFd"}
{"excludedObjects":[],"excludedObjectsCount":0,"exportedCount":614,"missingRefCount":0,"missingReferences":[]}

2. Import the .ndjson file through app/management/kibana/objects page,
3. After import, click any imported saved object, it will show blank saved_object page

4. Go to Index Pattern page, click any imported object, it will show blank page
5. Go to Machine Learning -> Anomaly Detection or Machine Learning -> Data Frame Analytic page, it will show blank page

Expected behavior:

Either it should have some validation for the special chars, or those blank page should throw valid errors and still be function-able.

[elasticmachine]

Pinging @elastic/kibana-core (Team:Core)

[pgayvallet]

Will be addressed by the initiative started with #104088

[afharo]

Resolved by #104088