fix(chart:*): fix access to chart instances

[cipchk]

• close Resizable G2 Charts ng-alain#1746

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ng-alain/delon/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[ ] No

Other information

[ng-alain-bot]

Preview is ready!

[codecov]

Codecov Report

Merging #983 into master will decrease coverage by 0.00%.
The diff coverage is 90.55%.

@@            Coverage Diff             @@
##           master     #983      +/-   ##
==========================================
- Coverage   96.71%   96.70%   -0.01%     
==========================================
  Files         233      233              
  Lines        7243     7261      +18     
  Branches     1392     1392              
==========================================
+ Hits         7005     7022      +17     
- Misses        141      142       +1     
  Partials       97       97              

Impacted Files	Coverage Δ
packages/chart/tag-cloud/tag-cloud.component.ts	34.93% <23.07%> (+0.37%)	⬆️
packages/chart/mini-area/mini-area.component.ts	94.44% <92.85%> (+0.15%)	⬆️
packages/chart/timeline/timeline.component.ts	91.66% <92.85%> (+0.20%)	⬆️
packages/chart/bar/bar.component.ts	91.42% <100.00%> (+0.25%)	⬆️
packages/chart/gauge/gauge.component.ts	96.36% <100.00%> (+0.13%)	⬆️
packages/chart/mini-bar/mini-bar.component.ts	94.11% <100.00%> (+0.24%)	⬆️
packages/chart/pie/pie.component.ts	92.63% <100.00%> (+0.15%)	⬆️
packages/chart/radar/radar.component.ts	97.05% <100.00%> (+0.08%)	⬆️
packages/chart/single-bar/single-bar.component.ts	95.91% <100.00%> (+0.17%)	⬆️
packages/chart/water-wave/water-wave.component.ts	78.98% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7597300...0167876. Read the comment docs.