[ui5-table]: table column title should be right alignment in RTL mode

[GongRichard]

Describe the bug
table column title should be right alignment in RTL mode.

To reproduce
Steps to reproduce the behavior:

1. Go to page https://github.wdf.sap.corp/pages/xweb/goalmanagementx/app.html?mock&sap-ui-rtl=true#/goal-detail?targetUserId=undefined&templateType=tgm&templateId=583&id=11003
2. click +12 avatar on the left bottom of Goal Alignment section of the page
3. You will see the table column title left alignment

Expected behavior
table column title should be right alignment in RTL mode.

Screenshots

Context

• UI5 Web Components version: 0.29.7
• OS/Platform: {...}
• Browser (if relevant): {...}
• Other information: {...}

[ilhan007]

The fix will be included in the next 0.29 patch