increase timeout of bookinfo e2e test

[YaoZengzeng]

What type of PR is this?

/kind enhancement

What this PR does / why we need it:

Which issue(s) this PR fixes:
Fixes #829

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.80%. Comparing base (e217f2b) to head (07c4871).
Report is 69 commits behind head on main.

see 15 files with indirect coverage changes

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[hzxuzhonghu]

Temporary fix
/lgtm

[kmesh-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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