Update Grafana Tempo helm chart

[Warashi]

What this PR does:

upgrade tempo chart

Why we need it:

I want to use the config below, introduced at Tempo v2.6.
The helm chart v1.10.2 points to Tempo v2.5.0, so I want to upgrade the chart.

metrics_generator:
  processor:
    local_blocks:
      flush_to_storage: true

ref; https://grafana.com/docs/tempo/latest/release-notes/v2-6/#operational-change-for-traceql-metrics

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[Warashi]

This change follows the upstream change.
grafana/helm-charts@e66f68a

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 25.80%. Comparing base (25c55a2) to head (8f6798a).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5396      +/-   ##
==========================================
- Coverage   25.81%   25.80%   -0.02%     
==========================================
  Files         450      450              
  Lines       48357    48357              
==========================================
- Hits        12484    12478       -6     
- Misses      34902    34908       +6     
  Partials      971      971              

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[khanhtc1202]

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[ffjlabo]

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