Patch shell version to v0.1.26

[w13915984028]

Problem:

harvester/harvester#6283

Solution:

Bump shell version to elimate/reduce CVE

manually cherry-pick from PR #766

Related Issue:
harvester/harvester#6283

Test plan:

[bk201]

Should we bump the monitoring and logging chart too?

[w13915984028]

@bk201

When v1.3.2 is only targeting for those must fix, then those considerations not to bump chart now:

(1) CVE fluentbit image has been 2.2.0 from Harvester v1.3.1; the PR #766 removes the patch to rancher-monitoring as upstream finally be in same version with Harvester.
(2) CVE shell version, bump to latest v0.1.26 in this PR #790; in v1.3.1 it was v0.1.22.

(3) PR #766 includes the eventrouter target v0.3.1 for Harvester v1.4.0; in Harvester v1.3.1 it was v0.2.0
(4) A known issue harvester/harvester#6272 needs to be fixed and backported to v1.3.2; then we can safely bump monitoring&logging chart in v1.4.0

If you target to release minor image tags for all Harvester components like harvester/harvester#6158, then I will rethink this PR.