Add sentry for monitor

[warjiang]

What type of PR is this?
/kind feature

What this PR does / why we need it:
Karmada-dashboard will be used in our end-users clusters, sometimes end-users will meet problems like crash of web-ui、system errors, for a better experience of detect bug and help end-users to solve problems quickly, we need to introduce monitor system help us capture exception stacktrace.

Which issue(s) this PR fixes:
Fixes #122

Special notes for your reviewer:

• we need to set SENTRY_AUTH_TOKEN but lack of permission

Does this PR introduce a user-facing change?:

NONE

[karmada-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[RainbowMango]

we need to set SENTRY_AUTH_TOKEN but lack of permission

I think we can talk about it at today's meeting.

[warjiang]

we need to set SENTRY_AUTH_TOKEN but lack of permission

I think we can talk about it at today's meeting.

ok~

[RainbowMango]

Hi, I added the secret with the name SENTRY_AUTH_TOKEN.

[RainbowMango]

Hi @warjiang does PR ready for moving forward?

[warjiang]

Hi @warjiang does PR ready for moving forward?

Need an extra switch to enable or disable monitor.

[RainbowMango]

Is it planned in this PR or a separate one?