Automated cherry pick of #961: fix(common): add purple to safelist

[erda-bot]

Cherry pick of #961 on release/1.2.

Squashed commit message:

commit b4077ad48f855b0848f90d0bac56099f0a1d3ad4
Author: 戣蓦 <mcdaddychen@126.com>
Date:   Tue Aug 17 09:52:34 2021 +0800

    fix(common): add purple to safelist (#961)

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What this PR does / why we need it:

fix bg-purple class missing in prod issue

Does this PR introduce a user interface change?

❎ No

ChangeLog

Language	Changelog
🇺🇸 English	fix purple color tag no background color issue
🇨🇳 中文	修复紫色标签无背景色的问题

Does this PR need be patched to older version?

✅ Yes(version is required)
release/1.2

Which issue(s) this PR fixes:

Fixes #